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UN Sustainable Development : Good health and well ... ✕Researcher : Emil ÖMÜRZAK ✕
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Yrd. Doç. Dr. Emil ÖMÜRZAKMühendislik Fakültesi
Good health and well-beingEnsure healthy lives and promote well-being for all ages
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Eco-Friendly Synthesis of Silver Nanoparticles Using Pulsed Plasma in Liquid: Effect of Surfactants

Emil ÖMÜRZAK

Silver (Ag) nanoparticles were successfully prepared by using the in-liquid pulsed plasma technique. This method is based on a low voltage, pulsed spark discharge in a dielectric liquid. We explore the effect of the protecting ligands, specifically Cetyl Trimethylammonium Bromide (CTAB), Polyvinylpyrrolidone (PVP), and Sodium n-Dodecyl Sulphate (SDS), used as surfactant materials to prevent nanoparticle aggregation. The X-Ray Diffraction (XRD) patterns of the samples confirm the face-centered cubic crystalline structure of Ag nanoparticles with the presence of Ag2O skin. Scanning Transmission ...More

Article 2022 Mühendislik Fakültesi Surfaces5 ( 1 ) 77 Views
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Synthesis of Nanomaterials by the Pulsed Plasma in Liquid and their Bio-medical Applications

Emil ÖMÜRZAK | Ruslan ADİL AKAY TEGİN

Pulsed plasma in liquid is a simple, ecologically friendly, cost-efficient method based on electrical discharge between two metal electrodes submerged into a dielectric liquid. We synthesized carbon-encapsulated Fe (Fe@C) magnetic nanoparticles with low cytotoxicity using pulsed plasma in a liquid. Body-centered cubic Fe core nanoparticles showed good crystalline structures with an average size between 20 and 30 nm were encapsulated in onion-like carbon coatings with a thickness of 2–10 nm. Thermal gravimetric analysis showed a high stability of the as-synthesized samples under thermal treatme ...More

Proceedings Paper 2018 Mühendislik Fakültesi 2017 International Conference on Aerospace Technology, Communications and Energy Systems (ATCES 2017)302 ( UNSP 012076 ) 94 Views
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Copper Nanoparticles: Synthesis and Biological Activity

Emil ÖMÜRZAK | Tinatin DOOLOTKELDİEVA | Saykal BOBUŞOVA

By means of XRD and FESEM analysis, it is established that copper nanoparticles with sizes less than 10 nm are formed during the chemical reduction, which form aggregates mainly with spherical shape. Presence of gelatin during the chemical reduction of copper induced formation of smaller size distribution nanoparticles than that of nanoparticles synthesized without gelatin and it can be related to formation of protective layer. Synthesized Cu nano-powders have sufficiently high activity against the Erwinia amylovora bacterium, and the bacterial growth inhibition depends on the Cu nanoparticles ...More

Proceedings Paper 2018 Mühendislik Fakültesi 2017 International Conference on Aerospace Technology, Communications and Energy Systems (ATCES 2017)302 ( UNSP 012075 ) 187 Views
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Effect of surfactant materials to nanoparticles formation under pulsed plasma conditions and their antibacterial properties

Emil ÖMÜRZAK | Ruslan ADİL AKAY TEGİN

Pulsed plasma between two Zn rods submerged into aqueous solution of cetyl trimethylammonium bromide (CTAB) and sodium dodecyl sulphate (SDS) surfactants resulted in formation of pure ZnO nanorods, while the pulsed plasma between two Zn rods in water without surfactant yielded a mixture of ZnO and Zn nanoparticles. Carbon coated ZnO nanorods with about 20 nm thickness and 150 nm length were synthesized by this method using different surfactant materials such as CTAB and SDS. Cu nanoparticles of about 10 nm in size were also synthesized by the pulsed plasma in aqueous solution of 0.2 % gelatine ...More

Proceedings Paper 2018 Mühendislik Fakültesi Materials Today: Proceedings5 ( 7-3 ) 106 Views
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Synthesis of biologically active silver and copper nanocomposites

Tinatin DOOLOTKELDİEVA | Emil ÖMÜRZAK

In the joint chemical reduction of silver and copper ions in the presence of gelatin, regardless of the composition of the reaction medium, a nanocomposite was formed consisting of nanodispersed silver and copper particles. In this research, the dependence of phase composition and dispersity on the synthesis conditions, as well as antibacterial activity of synthesized silver and copper nanocomposites were studied. It has been established that the most highly dispersed silver and copper nanocomposites were formed in an alkaline medium. We have revealed that nanocomposites of Ag-Cu system which ...More

Article 2018 Ziraat Fakültesi Materials Research Express5 ( 8 ) 78 Views
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